How to use Remove Duplicate Lines
- Paste your list, one item per line.
- Optionally check "Ignore case" to treat "Apple" and "apple" as duplicates.
- Click "Remove duplicates".
- Copy the cleaned list.
Key benefits
- Keeps the original order of first occurrences.
- Optional case-insensitive matching.
- Great for cleaning email lists, keyword lists and URLs.
- Runs locally in your browser.
Privacy
Remove Duplicate Lines runs entirely in your browser using local JavaScript. Your files and text are processed on your own device and are never uploaded to QuickTiny's servers.
Frequently asked questions
Does it keep the first or last occurrence?
The first occurrence of each line is kept; later duplicates are removed.
Does it trim whitespace before comparing?
No, comparison is exact (aside from the optional case-insensitive setting), so "item" and "item " with a trailing space are treated as different lines. Run Clean Text first if you need whitespace normalized.
Is empty-line handling special?
Empty lines are treated like any other line — repeated blank lines will also be deduplicated.